Labyrinthitis Classifications Circumscribed labyrinthitis (fistula of labyrinth) Communication of middle ear with perilymphatic space Serous labyrinthitis Toxin, inflammatory media Suppurative labyrinthitis BacteriaLabyrinthitis ◼ Classifications ◼ Cirvumscribed labyrinthitis (fistula of labyrinth) ◼ Communication of middle ear with perilymphatic space ◼ Serous labyrinthitis ◼ Toxin, inflammatory media ◼ Suppurative labyrinthitis ◼ Bacteria